Optoma ZK521ST-B 4K UHD Short Throw Laser Golf Simulator Projector

• True 4K UHD resolution (3840 x 2160) for sharper fairways, clearer greens and legible simulator data
• 5,000 lumens (measured to ISO 21118) for home golf simulators and commercial spaces
• 0.79:1 short throw lens that keeps the projector closer to the impact screen
• Vertical lens shift of 104% to 125%
• DuraCore laser light source rated for 30,000 hours (Eco mode) with no lamp replacements
• Geometric correction, H/V keystone and Smart Fit alignment through the Optoma Smart Control app
• Low input lag: 8.6 ms at 1080p 120Hz
• 3 year limited parts and labor warranty from Optoma

The ZK521ST-B uses a 0.79:1 short throw lens with no zoom and a vertical lens shift range of 104% to 125%, so image size is set by how far the projector sits from the screen.

Optoma's golf simulator guide gives the ZK521ST-B a height to throw ratio of 1.42:1, meaning the throw distance is roughly 1.42 times the height of the image. Because it throws from farther back than the ultra short throw models, it suits rooms with some depth behind the hitting area.

Every room and screen is different, so book a free consultation and our team will work out the right placement for your space before you order.

• Display technology: DLP
• Resolution: 4K UHD (3840 x 2160)
• Brightness: 5,000 lumens
• Contrast ratio: 300,000:1 (2,000,000:1 dynamic)
• Native aspect ratio: 16:9
• Compatible aspect ratios: 4:3, 16:9, 16:10, Full, Auto, Native
• Throw ratio: 0.79:1
• Lens shift: vertical 104% to 125%
• Zoom: none
• Keystone correction: +/-15 degrees horizontal and vertical
• Light source: DuraCore laser, 30,000 hours (Eco mode)
• Input lag: 16.7 ms at 4K 60Hz, 16.7 ms at 1080p 60Hz, 8.6 ms at 1080p 120Hz
• Inputs: 2 x HDMI 2.0 (eARC/ARC on HDMI 2), 1 x VGA
• Outputs: 2 x USB-A 2.0, 1 x 3D sync out, 1 x 3.5 mm audio
• Control: RJ45, RS232, 12V trigger
• Speaker: 1 x 15W
• Noise level: 29 dB(A)
• 24/7 and 360 degree operation: yes
• Power consumption: 196 W bright mode, 147 W Eco mode (110V)
• Dimensions (W x D x H): 10.8 x 8.5 x 4.3 in without feet
• Net weight: 6.6 lbs
• Optoma Management Suite and Optoma Smart Control app: supported

• 1 x Optoma ZK521ST-B projector
• 1 x AC power cord
• 1 x Remote control
• 2 x AAA batteries
• 1 x Quick start user manual

Smart Fit is Optoma's camera based screen alignment, run from the Optoma Smart Control app on your phone. Optoma describes it this way: Smart Fit uses your smartphone's camera to detect the screen frame and automatically correct the image alignment, significantly reducing installation effort. You mount the ZK521ST-B, open the app, point your phone at the impact screen, and the projector squares the picture to the frame.

What it adjusts, and what it does not

Smart Fit is geometry correction. It reshapes the edges of the picture so they land on the screen; it does not change the size of the picture the lens throws. The ZK521ST-B has a fixed 0.79:1 lens with no zoom, plus vertical lens shift, so the image size is set by how far the projector sits from the screen. If the projector is mounted a little too far back and the image overshoots the screen, Smart Fit and four corner correction can pull the edges in to fit. If it is mounted too close and the image falls short of the screen edges, no alignment tool makes the picture bigger; the projector has to move back. Get the mounting distance right first, then let Smart Fit do the fine alignment.

The other alignment tools in the app

• Smart Move: Optoma says Smart Move automatically detects obstacles using the camera and repositions the projection to a clear, unobstructed area.
• Horizontal and vertical keystone: corrects the trapezoid shape you get when the projector is angled to the screen, using a slide dial in the app.
• Four corner adjustment: tap and drag any corner of the image to reshape the frame in real time, which is the tool for a screen that is not perfectly square to the projector.

The Optoma Smart Control app

Optoma's app for iOS and Android handles setup, alignment and day to day control: power on and off, input switching, image settings and geometry correction, so you are not reaching for the remote between shots. Optoma also uses the app to deliver its Golf Sim picture mode, which it describes as purpose built display tuning for third party golf simulation software such as GSPro.

Every room and screen is different, so book a free consultation and our team will work out the mounting distance for your screen before you order.

This Optoma projector may be returned within 30 days of the date of delivery. Returned products must be unused or like new and undamaged, and must include all original packaging, accessories, cables and documentation.

Every return requires a Return Merchandise Authorization (RMA) number from Optoma, which our team will obtain for you, so please do not ship a return without one. Once a return or refund is accepted, the customer is responsible for return shipping costs, and original shipping charges are non-refundable. Returns are subject to a 15% restocking fee, along with the terms of the Garage Golf return policy, including any applicable processing fees. Refunds are issued to the original payment method once Optoma has received and inspected the returned item.

If your projector arrives damaged or defective, please contact us as soon as possible and we will report it to Optoma right away. Warranty coverage is provided by Optoma and varies by model. To start a return, email our team at contact@mygaragegolf.com and we will arrange it with Optoma directly and walk you through the appropriate steps.